727
FZPN40 PHFO 152116
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC TUE SEP 15 2026

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT
OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE MORE THAN
TWICE THE SIGNIFICANT WAVE HEIGHT.

THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE
HIGHER THAN 10-MINUTE AVERAGE WINDS.

SECURITE

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W

SYNOPSIS VALID 1800 UTC SEP 15 2026.
24 HOUR FORECAST VALID 1800 UTC SEP 16 2026.
48 HOUR FORECAST VALID 1800 UTC SEP 17 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.POST-TROPICAL CYCLONE NORBERT NEAR 20.5N 143.8W 1006 MB W 10 KT.
WINDS 20 TO 30 KT AND SEAS 2.5 TO 3.5 M FROM 20N TO 25N E OF 146W.
ISOLATED MODERATE TSTMS FROM 20N TO 22N E OF 145W.
.24 HOUR FORECAST LOW 20N150W 1012 MB. WINDS 20 TO 25 KT AND SEAS
2.5 TO 3 M IN AREA BOUNDED BY 25N152W 24N140W 16N140W 21N152W
25N152W.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 22N155W TO 18N154W.
WINDS 20 TO 25 KT AND SEAS 2.5 TO 3 M IN AREA BOUNDED BY 25N160W
24N140W 15N140W 16N150W 21N160W 25N160W.

.FRONT FROM 30N172W TO 26N174W TO 22N180W WITH TRAILING POST-
FRONTAL TROUGH FROM 30N175W TO 26N178W BOTH NEARLY STATIONARY.
WINDS 20 TO 25 KT BETWEEN FRONT AND 167W N OF 26N...AND N OF 28N W
OF 178W. SEAS 2.5 TO 3.5 M N OF 28N W OF 178W. SCATTERED MODERATE
TSTMS WITHIN 150 NM E OF FRONT N OF 26N. ISOLATED TSTMS WITHIN 90
NM OF FRONT S OF 26N.
.12 HOUR FORECAST LOW 27N178W 1007 MB. FRONT FROM 30N176W TO
22N180W. TROUGH FROM LOW TO 23N180W. WINDS 20 TO 25 KT BETWEEN
FRONT AND 172W N OF 28N. SEAS 2.5 TO 4 M N OF LINE FROM 30N177W TO
26N180W.
.24 HOUR FORECAST LOW MOVED W OF FORECAST AREA. FRONT AND TROUGH
MERGED FROM 30N178W TO 23N180W. WINDS 20 TO 25 KT BETWEEN FRONT AND
172W N OF 28N. SEAS 2.5 TO 3 M W OF LINE FROM 30N171W TO 26N180W.
.48 HOUR FORECAST FRONT AND TROUGH MOVED W OF AREA. WINDS 20 TO 25
KT IN AREA BOUNDED BY 30N180W 26N165W 21N165W 24N180W 30N180W. SEAS
SUBSIDED TO 2.5 M OR LESS.

.WEAK LOW 11N152W 1008 MB NEARLY STATIONARY. SEE THUNDERSTORMS
BELOW IN MONSOON TROUGH SECTION.
.24 HOUR FORECAST WEAK LOW 11N153W 1009 MB.
.48 HOUR FORECAST WEAK LOW 10N157W 1010 MB.

.TROUGH FROM 30N147W TO 27N147W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.

.WINDS 20 KT OR LESS AND SEAS 2.5 M OR LOWER OVER THE REMAINDER OF
FORECAST AREA.

.ISOLATED MODERATE TSTMS WITHIN 90 NM OF LINE FROM 10N172W TO
17N173W.

.MONSOON TROUGH FROM 14N140W TO 15N143W TO 09N154W TO 07N164W TO
08N180W. ISOLATED MODERATE TO LOCALLY STRONG TSTMS WITHIN 150 NM N
OF TROUGH E OF 154W...S OF TROUGH BETWEEN 150W AND 168W...AND
WITHIN 240 NM N OF TROUGH W OF 175W.

$$

.FORECASTER WROE. HONOLULU HI.